diff --git a/compiler/testData/diagnostics/tests/override/ExtendFunctionClass.jet b/compiler/testData/diagnostics/tests/override/ExtendFunctionClass.jet
index c0b0380a00a..bfbc3238d3b 100644
--- a/compiler/testData/diagnostics/tests/override/ExtendFunctionClass.jet
+++ b/compiler/testData/diagnostics/tests/override/ExtendFunctionClass.jet
@@ -4,6 +4,6 @@ class <!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>A<!> : Function1<Int, Int>() {
 
 }
 
-class B : Function1<Int, Int> {
+class B : Function1<Int, Int>() {
     override fun invoke(p1 : Int) = p1
 }